Figure 1

Changes in the profession percentages of participants. To simplify statistical comparisons of proportion changes of participants, participants were divided into two categories: the Novice, 1–2-year residents and non-physicians; the Expert, the others. Comparisons of proportion of the participants between years were tested using Chi-squared test. The percentages of novice participants statistically increased year by year. *p < 0.01 compared between years. Others: clinical engineers, physiotherapists, emergency medical technicians, dentists, and pharmacists. Nurses: any nurse. Junior residents: physicians who had clinical experience less than 2 years. Senior residents: physicians who had clinical experience more than 2 years and less than 5 years. Physicians: physicians who had clinical experience more than 5 years and less than 10 years. Experienced physicians: physicians who had clinical experience more than 10 years.